package com.taiyi.renaissancemall.view;

import android.content.Context;
import android.util.AttributeSet;
import android.view.GestureDetector;
import android.view.MotionEvent;
import android.view.View;
import android.view.ViewConfiguration;
import android.webkit.WebView;
import android.widget.ScrollView;

public class MyScrollView extends ScrollView {

    private int downX;

    private int downY;

    private int mTouchSlop;
    private GestureDetector mGestureDetector;


    public MyScrollView(Context context) {
        super(context);
        mTouchSlop = ViewConfiguration.get(context).getScaledTouchSlop();
    }


    public MyScrollView(Context context, AttributeSet attrs) {
        super(context, attrs);
        mTouchSlop = ViewConfiguration.get(context).getScaledTouchSlop();
        mGestureDetector = new GestureDetector(new YScrollDetector());

        setFadingEdgeLength(0);
    }


    public MyScrollView(Context context, AttributeSet attrs, int defStyleAttr) {
        super(context, attrs, defStyleAttr);
        mTouchSlop = ViewConfiguration.get(context).getScaledTouchSlop();
    }


    @Override
    public boolean onInterceptTouchEvent(MotionEvent e) {
        int action = e.getAction();

        switch (action) {
            case MotionEvent.ACTION_DOWN:
                downX = (int) e.getRawX();
                downY = (int) e.getRawY();

                break;
            case MotionEvent.ACTION_MOVE:
                int moveY = (int) e.getRawY();
                if (Math.abs(moveY - downY) > mTouchSlop) {
                    return true;
                }

        }
        return super.onInterceptTouchEvent(e) && mGestureDetector.onTouchEvent(e);
    }


// Return false if we're scrolling in the x direction

    class YScrollDetector extends GestureDetector.SimpleOnGestureListener {

        @Override
        public boolean onScroll(MotionEvent e1, MotionEvent e2, float distanceX, float distanceY) {
            if (Math.abs(distanceY) > Math.abs(distanceX)) {
                return true;
            }
            return false;
        }
    }


}
